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ADC10158 交流输入问题



ADC 10158 正负5V供电,Vref+接+5V,Vref-接地,  模拟输入通道输入负电压时输出为0,输入正电压感觉数据波动较大,怎么解决?

如何使输入通道采集正负幅值为5V的交流信号?